Re:Gasket sealant, need everyone opinion.

[Bruce Murray <bmurray@xxxxxxx>]

>
>I was told to used Permatex Ultra Gray on 164 thermostat housing=20
>and CAM cover as gasket sealant.  It is a very good stuff,=20
>stay pliable and never hardened.  Funny it is a little bit=20
>hard to find Ultra Gray while there are Ultra Blue, Ultra Black...
>on every auto store.  I finally found one.
>
>As for 164 intake duct gasket glue, Ultra gray is not sticky enough.
>I use Permatex high tack gasket sealant.  It's hard to apply but=20
>easy to clean with alcohol.=20
>

Well since Karl asks for everyone's opinion here's mine:-

YOU SHOULD ABSOLUTELY NOT USE SILICON GASKET SEALER IN AN ENGINE WHERE IT
IS IN CONTACT WITH THE OIL SYSTEM.
The little pieces that are sqeezed out of the joint will set up and may
fall off inside the engine. They can then fall into the oil system and may
cause blockages.

ALFA, I seem to remember, issued a service bulletin which said that the
engine warranty would be voided if silicon sealant were used.

The car manufacturers may provide gaskets which have a silicone applied in
a carefully controlled quantity so that none can get into the engine.

Silicon Gasket Sealer is OK for the water passages I suppose but even there
small bits could clog the radiator tubes.

IMHO, the best material to use is

PERMATEX HYLOMAR HPF Hi-Temp Gasket Dressing=20

Permatex=AE HYLOMAR=AE HPF Gasket Dressing and Flange Sealant=20
An exceptional high tack gel sealant that is non-hardening, allowing for
easy disassembly of flanged components even after long-term operation.=
 No-run
formula is compatible with flanged surfaces and mechanical gasketing
materials. Temperature range -60=B0F to 600=B0F, resists fuels, lubricants,=
 water,
water/glycol and related engine fluids. Contains no ODC/VOC solvents.=20


It was originally developed by Rolls Royce over 30 years ago and is
licensed to Permatex.

It is costly (and may not be easy to get) but look at the cost of what you
are protecting!

Well that should set the cat among the pigeons!

Have a nice weekend and don't forget to watch the Spa Formula One Belgium
Grand Prix this weekend (if you get Speedvision)

Cheers

Bruce

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